File:PHS scientists at hatmaking study 1930s.jpg
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![File:PHS scientists at hatmaking study 1930s.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e6/PHS_scientists_at_hatmaking_study_1930s.jpg/762px-PHS_scientists_at_hatmaking_study_1930s.jpg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:36, 19 November 2021 | ![]() | 2,334 × 1,836 (1.57 MB) | John P. Sadowski (NIOSH) | Uploaded a work by U.S. Public Health Service from https://phil.cdc.gov/Details.aspx?pid=9698 with UploadWizard |
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